1 /* 2 * Copyright (c) 2003 Daniel M. Eischen <deischen@freebsd.org> 3 * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by John Birrell. 17 * 4. Neither the name of the author nor the names of any co-contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * $FreeBSD$ 34 */ 35 36 #include "namespace.h" 37 #include <sys/types.h> 38 #include <sys/signalvar.h> 39 #include <sys/ioctl.h> 40 #include <sys/sysctl.h> 41 #include <sys/ttycom.h> 42 #include <sys/mman.h> 43 #include <errno.h> 44 #include <fcntl.h> 45 #include <paths.h> 46 #include <pthread.h> 47 #include <pthread_np.h> 48 #include <signal.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <time.h> 52 #include <unistd.h> 53 #include "un-namespace.h" 54 55 #include "libc_private.h" 56 #include "thr_private.h" 57 58 void *_usrstack; 59 struct pthread *_thr_initial; 60 int _thr_scope_system; 61 int _libthr_debug; 62 int _thread_event_mask; 63 struct pthread *_thread_last_event; 64 pthreadlist _thread_list = TAILQ_HEAD_INITIALIZER(_thread_list); 65 pthreadlist _thread_gc_list = TAILQ_HEAD_INITIALIZER(_thread_gc_list); 66 int _thread_active_threads = 1; 67 atfork_head _thr_atfork_list = TAILQ_HEAD_INITIALIZER(_thr_atfork_list); 68 umtx_t _thr_atfork_lock; 69 70 struct pthread_attr _pthread_attr_default = { 71 .sched_policy = SCHED_RR, 72 .sched_inherit = 0, 73 .sched_interval = TIMESLICE_USEC, 74 .prio = THR_DEFAULT_PRIORITY, 75 .suspend = THR_CREATE_RUNNING, 76 .flags = 0, 77 .arg_attr = NULL, 78 .cleanup_attr = NULL, 79 .stackaddr_attr = NULL, 80 .stacksize_attr = THR_STACK_DEFAULT, 81 .guardsize_attr = 0 82 }; 83 84 struct pthread_mutex_attr _pthread_mutexattr_default = { 85 .m_type = PTHREAD_MUTEX_DEFAULT, 86 .m_protocol = PTHREAD_PRIO_NONE, 87 .m_ceiling = 0, 88 .m_flags = 0 89 }; 90 91 /* Default condition variable attributes: */ 92 struct pthread_cond_attr _pthread_condattr_default = { 93 .c_pshared = PTHREAD_PROCESS_PRIVATE, 94 .c_clockid = CLOCK_REALTIME 95 }; 96 97 pid_t _thr_pid; 98 int _thr_guard_default; 99 int _thr_stack_default = THR_STACK_DEFAULT; 100 int _thr_stack_initial = THR_STACK_INITIAL; 101 int _thr_page_size; 102 int _gc_count; 103 umtx_t _mutex_static_lock; 104 umtx_t _cond_static_lock; 105 umtx_t _rwlock_static_lock; 106 umtx_t _keytable_lock; 107 umtx_t _thr_list_lock; 108 umtx_t _thr_event_lock; 109 110 int __pthread_cond_wait(pthread_cond_t *, pthread_mutex_t *); 111 int __pthread_mutex_lock(pthread_mutex_t *); 112 int __pthread_mutex_trylock(pthread_mutex_t *); 113 void _thread_init_hack(void) __attribute__ ((constructor)); 114 115 static void init_private(void); 116 static void init_main_thread(struct pthread *thread); 117 118 /* 119 * All weak references used within libc should be in this table. 120 * This is so that static libraries will work. 121 */ 122 STATIC_LIB_REQUIRE(_accept); 123 STATIC_LIB_REQUIRE(_bind); 124 STATIC_LIB_REQUIRE(_close); 125 STATIC_LIB_REQUIRE(_connect); 126 STATIC_LIB_REQUIRE(_dup); 127 STATIC_LIB_REQUIRE(_dup2); 128 STATIC_LIB_REQUIRE(_execve); 129 STATIC_LIB_REQUIRE(_fcntl); 130 STATIC_LIB_REQUIRE(_flock); 131 STATIC_LIB_REQUIRE(_flockfile); 132 STATIC_LIB_REQUIRE(_fstat); 133 STATIC_LIB_REQUIRE(_fstatfs); 134 STATIC_LIB_REQUIRE(_fsync); 135 STATIC_LIB_REQUIRE(_getdirentries); 136 STATIC_LIB_REQUIRE(_getlogin); 137 STATIC_LIB_REQUIRE(_getpeername); 138 STATIC_LIB_REQUIRE(_getsockname); 139 STATIC_LIB_REQUIRE(_getsockopt); 140 STATIC_LIB_REQUIRE(_ioctl); 141 STATIC_LIB_REQUIRE(_kevent); 142 STATIC_LIB_REQUIRE(_listen); 143 STATIC_LIB_REQUIRE(_nanosleep); 144 STATIC_LIB_REQUIRE(_open); 145 STATIC_LIB_REQUIRE(_pthread_getspecific); 146 STATIC_LIB_REQUIRE(_pthread_key_create); 147 STATIC_LIB_REQUIRE(_pthread_key_delete); 148 STATIC_LIB_REQUIRE(_pthread_mutex_destroy); 149 STATIC_LIB_REQUIRE(_pthread_mutex_init); 150 STATIC_LIB_REQUIRE(_pthread_mutex_lock); 151 STATIC_LIB_REQUIRE(_pthread_mutex_trylock); 152 STATIC_LIB_REQUIRE(_pthread_mutex_unlock); 153 STATIC_LIB_REQUIRE(_pthread_mutexattr_init); 154 STATIC_LIB_REQUIRE(_pthread_mutexattr_destroy); 155 STATIC_LIB_REQUIRE(_pthread_mutexattr_settype); 156 STATIC_LIB_REQUIRE(_pthread_once); 157 STATIC_LIB_REQUIRE(_pthread_setspecific); 158 STATIC_LIB_REQUIRE(_read); 159 STATIC_LIB_REQUIRE(_readv); 160 STATIC_LIB_REQUIRE(_recvfrom); 161 STATIC_LIB_REQUIRE(_recvmsg); 162 STATIC_LIB_REQUIRE(_select); 163 STATIC_LIB_REQUIRE(_sendmsg); 164 STATIC_LIB_REQUIRE(_sendto); 165 STATIC_LIB_REQUIRE(_setsockopt); 166 STATIC_LIB_REQUIRE(_sigaction); 167 STATIC_LIB_REQUIRE(_sigprocmask); 168 STATIC_LIB_REQUIRE(_sigsuspend); 169 STATIC_LIB_REQUIRE(_socket); 170 STATIC_LIB_REQUIRE(_socketpair); 171 STATIC_LIB_REQUIRE(_thread_init_hack); 172 STATIC_LIB_REQUIRE(_wait4); 173 STATIC_LIB_REQUIRE(_write); 174 STATIC_LIB_REQUIRE(_writev); 175 176 /* 177 * These are needed when linking statically. All references within 178 * libgcc (and in the future libc) to these routines are weak, but 179 * if they are not (strongly) referenced by the application or other 180 * libraries, then the actual functions will not be loaded. 181 */ 182 STATIC_LIB_REQUIRE(_pthread_once); 183 STATIC_LIB_REQUIRE(_pthread_key_create); 184 STATIC_LIB_REQUIRE(_pthread_key_delete); 185 STATIC_LIB_REQUIRE(_pthread_getspecific); 186 STATIC_LIB_REQUIRE(_pthread_setspecific); 187 STATIC_LIB_REQUIRE(_pthread_mutex_init); 188 STATIC_LIB_REQUIRE(_pthread_mutex_destroy); 189 STATIC_LIB_REQUIRE(_pthread_mutex_lock); 190 STATIC_LIB_REQUIRE(_pthread_mutex_trylock); 191 STATIC_LIB_REQUIRE(_pthread_mutex_unlock); 192 STATIC_LIB_REQUIRE(_pthread_create); 193 194 /* Pull in all symbols required by libthread_db */ 195 STATIC_LIB_REQUIRE(_thread_state_running); 196 197 #define DUAL_ENTRY(entry) \ 198 (pthread_func_t)entry, (pthread_func_t)entry 199 200 static pthread_func_t jmp_table[][2] = { 201 {DUAL_ENTRY(_pthread_atfork)}, /* PJT_ATFORK */ 202 {DUAL_ENTRY(_pthread_attr_destroy)}, /* PJT_ATTR_DESTROY */ 203 {DUAL_ENTRY(_pthread_attr_getdetachstate)}, /* PJT_ATTR_GETDETACHSTATE */ 204 {DUAL_ENTRY(_pthread_attr_getguardsize)}, /* PJT_ATTR_GETGUARDSIZE */ 205 {DUAL_ENTRY(_pthread_attr_getinheritsched)}, /* PJT_ATTR_GETINHERITSCHED */ 206 {DUAL_ENTRY(_pthread_attr_getschedparam)}, /* PJT_ATTR_GETSCHEDPARAM */ 207 {DUAL_ENTRY(_pthread_attr_getschedpolicy)}, /* PJT_ATTR_GETSCHEDPOLICY */ 208 {DUAL_ENTRY(_pthread_attr_getscope)}, /* PJT_ATTR_GETSCOPE */ 209 {DUAL_ENTRY(_pthread_attr_getstackaddr)}, /* PJT_ATTR_GETSTACKADDR */ 210 {DUAL_ENTRY(_pthread_attr_getstacksize)}, /* PJT_ATTR_GETSTACKSIZE */ 211 {DUAL_ENTRY(_pthread_attr_init)}, /* PJT_ATTR_INIT */ 212 {DUAL_ENTRY(_pthread_attr_setdetachstate)}, /* PJT_ATTR_SETDETACHSTATE */ 213 {DUAL_ENTRY(_pthread_attr_setguardsize)}, /* PJT_ATTR_SETGUARDSIZE */ 214 {DUAL_ENTRY(_pthread_attr_setinheritsched)}, /* PJT_ATTR_SETINHERITSCHED */ 215 {DUAL_ENTRY(_pthread_attr_setschedparam)}, /* PJT_ATTR_SETSCHEDPARAM */ 216 {DUAL_ENTRY(_pthread_attr_setschedpolicy)}, /* PJT_ATTR_SETSCHEDPOLICY */ 217 {DUAL_ENTRY(_pthread_attr_setscope)}, /* PJT_ATTR_SETSCOPE */ 218 {DUAL_ENTRY(_pthread_attr_setstackaddr)}, /* PJT_ATTR_SETSTACKADDR */ 219 {DUAL_ENTRY(_pthread_attr_setstacksize)}, /* PJT_ATTR_SETSTACKSIZE */ 220 {DUAL_ENTRY(_pthread_cancel)}, /* PJT_CANCEL */ 221 {DUAL_ENTRY(_pthread_cleanup_pop)}, /* PJT_CLEANUP_POP */ 222 {DUAL_ENTRY(_pthread_cleanup_push)}, /* PJT_CLEANUP_PUSH */ 223 {DUAL_ENTRY(_pthread_cond_broadcast)}, /* PJT_COND_BROADCAST */ 224 {DUAL_ENTRY(_pthread_cond_destroy)}, /* PJT_COND_DESTROY */ 225 {DUAL_ENTRY(_pthread_cond_init)}, /* PJT_COND_INIT */ 226 {DUAL_ENTRY(_pthread_cond_signal)}, /* PJT_COND_SIGNAL */ 227 {DUAL_ENTRY(_pthread_cond_timedwait)}, /* PJT_COND_TIMEDWAIT */ 228 {(pthread_func_t)__pthread_cond_wait, 229 (pthread_func_t)_pthread_cond_wait}, /* PJT_COND_WAIT */ 230 {DUAL_ENTRY(_pthread_detach)}, /* PJT_DETACH */ 231 {DUAL_ENTRY(_pthread_equal)}, /* PJT_EQUAL */ 232 {DUAL_ENTRY(_pthread_exit)}, /* PJT_EXIT */ 233 {DUAL_ENTRY(_pthread_getspecific)}, /* PJT_GETSPECIFIC */ 234 {DUAL_ENTRY(_pthread_join)}, /* PJT_JOIN */ 235 {DUAL_ENTRY(_pthread_key_create)}, /* PJT_KEY_CREATE */ 236 {DUAL_ENTRY(_pthread_key_delete)}, /* PJT_KEY_DELETE*/ 237 {DUAL_ENTRY(_pthread_kill)}, /* PJT_KILL */ 238 {DUAL_ENTRY(_pthread_main_np)}, /* PJT_MAIN_NP */ 239 {DUAL_ENTRY(_pthread_mutexattr_destroy)}, /* PJT_MUTEXATTR_DESTROY */ 240 {DUAL_ENTRY(_pthread_mutexattr_init)}, /* PJT_MUTEXATTR_INIT */ 241 {DUAL_ENTRY(_pthread_mutexattr_settype)}, /* PJT_MUTEXATTR_SETTYPE */ 242 {DUAL_ENTRY(_pthread_mutex_destroy)}, /* PJT_MUTEX_DESTROY */ 243 {DUAL_ENTRY(_pthread_mutex_init)}, /* PJT_MUTEX_INIT */ 244 {(pthread_func_t)__pthread_mutex_lock, 245 (pthread_func_t)_pthread_mutex_lock}, /* PJT_MUTEX_LOCK */ 246 {(pthread_func_t)__pthread_mutex_trylock, 247 (pthread_func_t)_pthread_mutex_trylock},/* PJT_MUTEX_TRYLOCK */ 248 {DUAL_ENTRY(_pthread_mutex_unlock)}, /* PJT_MUTEX_UNLOCK */ 249 {DUAL_ENTRY(_pthread_once)}, /* PJT_ONCE */ 250 {DUAL_ENTRY(_pthread_rwlock_destroy)}, /* PJT_RWLOCK_DESTROY */ 251 {DUAL_ENTRY(_pthread_rwlock_init)}, /* PJT_RWLOCK_INIT */ 252 {DUAL_ENTRY(_pthread_rwlock_rdlock)}, /* PJT_RWLOCK_RDLOCK */ 253 {DUAL_ENTRY(_pthread_rwlock_tryrdlock)},/* PJT_RWLOCK_TRYRDLOCK */ 254 {DUAL_ENTRY(_pthread_rwlock_trywrlock)},/* PJT_RWLOCK_TRYWRLOCK */ 255 {DUAL_ENTRY(_pthread_rwlock_unlock)}, /* PJT_RWLOCK_UNLOCK */ 256 {DUAL_ENTRY(_pthread_rwlock_wrlock)}, /* PJT_RWLOCK_WRLOCK */ 257 {DUAL_ENTRY(_pthread_self)}, /* PJT_SELF */ 258 {DUAL_ENTRY(_pthread_setcancelstate)}, /* PJT_SETCANCELSTATE */ 259 {DUAL_ENTRY(_pthread_setcanceltype)}, /* PJT_SETCANCELTYPE */ 260 {DUAL_ENTRY(_pthread_setspecific)}, /* PJT_SETSPECIFIC */ 261 {DUAL_ENTRY(_pthread_sigmask)}, /* PJT_SIGMASK */ 262 {DUAL_ENTRY(_pthread_testcancel)} /* PJT_TESTCANCEL */ 263 }; 264 265 static int init_once = 0; 266 267 /* 268 * For the shared version of the threads library, the above is sufficient. 269 * But for the archive version of the library, we need a little bit more. 270 * Namely, we must arrange for this particular module to be pulled in from 271 * the archive library at link time. To accomplish that, we define and 272 * initialize a variable, "_thread_autoinit_dummy_decl". This variable is 273 * referenced (as an extern) from libc/stdlib/exit.c. This will always 274 * create a need for this module, ensuring that it is present in the 275 * executable. 276 */ 277 extern int _thread_autoinit_dummy_decl; 278 int _thread_autoinit_dummy_decl = 0; 279 280 void 281 _thread_init_hack(void) 282 { 283 284 _libpthread_init(NULL); 285 } 286 287 288 /* 289 * Threaded process initialization. 290 * 291 * This is only called under two conditions: 292 * 293 * 1) Some thread routines have detected that the library hasn't yet 294 * been initialized (_thr_initial == NULL && curthread == NULL), or 295 * 296 * 2) An explicit call to reinitialize after a fork (indicated 297 * by curthread != NULL) 298 */ 299 void 300 _libpthread_init(struct pthread *curthread) 301 { 302 int fd, first = 0; 303 sigset_t sigset, oldset; 304 305 /* Check if this function has already been called: */ 306 if ((_thr_initial != NULL) && (curthread == NULL)) 307 /* Only initialize the threaded application once. */ 308 return; 309 310 /* 311 * Check the size of the jump table to make sure it is preset 312 * with the correct number of entries. 313 */ 314 if (sizeof(jmp_table) != (sizeof(pthread_func_t) * PJT_MAX * 2)) 315 PANIC("Thread jump table not properly initialized"); 316 memcpy(__thr_jtable, jmp_table, sizeof(jmp_table)); 317 318 /* 319 * Check for the special case of this process running as 320 * or in place of init as pid = 1: 321 */ 322 if ((_thr_pid = getpid()) == 1) { 323 /* 324 * Setup a new session for this process which is 325 * assumed to be running as root. 326 */ 327 if (setsid() == -1) 328 PANIC("Can't set session ID"); 329 if (revoke(_PATH_CONSOLE) != 0) 330 PANIC("Can't revoke console"); 331 if ((fd = __sys_open(_PATH_CONSOLE, O_RDWR)) < 0) 332 PANIC("Can't open console"); 333 if (setlogin("root") == -1) 334 PANIC("Can't set login to root"); 335 if (__sys_ioctl(fd, TIOCSCTTY, (char *) NULL) == -1) 336 PANIC("Can't set controlling terminal"); 337 } 338 339 /* Initialize pthread private data. */ 340 init_private(); 341 342 /* Set the initial thread. */ 343 if (curthread == NULL) { 344 first = 1; 345 /* Create and initialize the initial thread. */ 346 curthread = _thr_alloc(NULL); 347 if (curthread == NULL) 348 PANIC("Can't allocate initial thread"); 349 init_main_thread(curthread); 350 } 351 /* 352 * Add the thread to the thread list queue. 353 */ 354 THR_LIST_ADD(curthread); 355 _thread_active_threads = 1; 356 357 /* Setup the thread specific data */ 358 _tcb_set(curthread->tcb); 359 360 if (first) { 361 SIGFILLSET(sigset); 362 SIGDELSET(sigset, SIGTRAP); 363 __sys_sigprocmask(SIG_SETMASK, &sigset, &oldset); 364 _thr_signal_init(); 365 _thr_initial = curthread; 366 SIGDELSET(oldset, SIGCANCEL); 367 __sys_sigprocmask(SIG_SETMASK, &oldset, NULL); 368 if (_thread_event_mask & TD_CREATE) 369 _thr_report_creation(curthread, curthread); 370 } 371 } 372 373 /* 374 * This function and pthread_create() do a lot of the same things. 375 * It'd be nice to consolidate the common stuff in one place. 376 */ 377 static void 378 init_main_thread(struct pthread *thread) 379 { 380 /* Setup the thread attributes. */ 381 thr_self(&thread->tid); 382 thread->attr = _pthread_attr_default; 383 /* 384 * Set up the thread stack. 385 * 386 * Create a red zone below the main stack. All other stacks 387 * are constrained to a maximum size by the parameters 388 * passed to mmap(), but this stack is only limited by 389 * resource limits, so this stack needs an explicitly mapped 390 * red zone to protect the thread stack that is just beyond. 391 */ 392 if (mmap((void *)_usrstack - _thr_stack_initial - 393 _thr_guard_default, _thr_guard_default, 0, MAP_ANON, 394 -1, 0) == MAP_FAILED) 395 PANIC("Cannot allocate red zone for initial thread"); 396 397 /* 398 * Mark the stack as an application supplied stack so that it 399 * isn't deallocated. 400 * 401 * XXX - I'm not sure it would hurt anything to deallocate 402 * the main thread stack because deallocation doesn't 403 * actually free() it; it just puts it in the free 404 * stack queue for later reuse. 405 */ 406 thread->attr.stackaddr_attr = (void *)_usrstack - _thr_stack_initial; 407 thread->attr.stacksize_attr = _thr_stack_initial; 408 thread->attr.guardsize_attr = _thr_guard_default; 409 thread->attr.flags |= THR_STACK_USER; 410 411 /* 412 * Write a magic value to the thread structure 413 * to help identify valid ones: 414 */ 415 thread->magic = THR_MAGIC; 416 417 thread->cancelflags = PTHREAD_CANCEL_ENABLE | PTHREAD_CANCEL_DEFERRED; 418 thr_set_name(thread->tid, "initial thread"); 419 420 /* Default the priority of the initial thread: */ 421 thread->base_priority = THR_DEFAULT_PRIORITY; 422 thread->active_priority = THR_DEFAULT_PRIORITY; 423 thread->inherited_priority = 0; 424 425 /* Initialize the mutex queue: */ 426 TAILQ_INIT(&thread->mutexq); 427 TAILQ_INIT(&thread->pri_mutexq); 428 429 thread->state = PS_RUNNING; 430 431 /* Others cleared to zero by thr_alloc() */ 432 } 433 434 static void 435 init_private(void) 436 { 437 size_t len; 438 int mib[2]; 439 440 _thr_umtx_init(&_mutex_static_lock); 441 _thr_umtx_init(&_cond_static_lock); 442 _thr_umtx_init(&_rwlock_static_lock); 443 _thr_umtx_init(&_keytable_lock); 444 _thr_umtx_init(&_thr_atfork_lock); 445 _thr_umtx_init(&_thr_event_lock); 446 _thr_once_init(); 447 _thr_spinlock_init(); 448 _thr_list_init(); 449 450 /* 451 * Avoid reinitializing some things if they don't need to be, 452 * e.g. after a fork(). 453 */ 454 if (init_once == 0) { 455 /* Find the stack top */ 456 mib[0] = CTL_KERN; 457 mib[1] = KERN_USRSTACK; 458 len = sizeof (_usrstack); 459 if (sysctl(mib, 2, &_usrstack, &len, NULL, 0) == -1) 460 PANIC("Cannot get kern.usrstack from sysctl"); 461 _thr_page_size = getpagesize(); 462 _thr_guard_default = _thr_page_size; 463 _pthread_attr_default.guardsize_attr = _thr_guard_default; 464 _pthread_attr_default.stacksize_attr = _thr_stack_default; 465 466 TAILQ_INIT(&_thr_atfork_list); 467 #ifdef SYSTEM_SCOPE_ONLY 468 _thr_scope_system = 1; 469 #else 470 if (getenv("LIBPTHREAD_SYSTEM_SCOPE") != NULL) 471 _thr_scope_system = 1; 472 else if (getenv("LIBPTHREAD_PROCESS_SCOPE") != NULL) 473 _thr_scope_system = -1; 474 #endif 475 } 476 init_once = 1; 477 } 478